Question

50+50 points question.
Find the ∆Hformation(∆Hf) of
iso-preme from following data
B.E.(Bond energy) of C-C=92kcal
B.E. of C-H=106kcal
B.E. of C double bond C=112 kcal
B.E. of H-H=104kcal
∆Hsublimation(∆Hs) of C=117kcal
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Answer 2

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